Crossbar telephone system with marker release and lockout of defective line



April 14, 1953 2,635,148

J. O'D. SHEPHERD CROSSBAR TELEPHONE SYSTEM WITH MARKER RELEASE AND LOCKOUT OF DEFECTIVE LINE Original Filed May 5, 1943 53 Sheets-heet 1 LINE l-o-o= L i i FLAT RATE OUTLET LINE CCT EQUIPMENT MARGINA L LINE l MARC/MAL FIG TEN

lsmrlo MARC/"AL PRIMARY SWITCH FRAME B INCOM/NG TRUNK TRUNK TO TANDEM INVENTOR J; on snap/15m BY ATTORNEY April 14, 1953 J. OD. SHEPHERD 2,635,148 CROSSBAR TELEPHONE SYSTEM WITH MARKER RELEASE AND LOCKOUT OF DEFECTIVE LINE Original Filed May 5, 1943 55 Sheets-Sheet 2 10S .HUPxkO than S //v VENTOR J. O'DQ HEPHERD A T TORNEV April 14, 1953 J. OD. SHEPHERD CROSSBAR TELEPHONE SYSTEM WITH MARKER RELEASE AND LOCKOUT 0F DEFECTIVE LINE 53 Sheets-Sheet 35 Original Filed May 5, 1943 R Uta 20C QOQ kbO INVENTOR -.1 0'0. SHEPHERD A T TORNEY Arm/WU J. O'D. SHEPHERD 2,635,148 CROSSBAR TELEPHONE .SYSTEM WITH MARKER RELEASE AND LOCKOUT 0F DEFECTIVE LINE Original Filed May 5, 1943 53 Sheets-Sheet 4 lNl/ENTOR .1 00. SHEPHERD BY April 14, 1953 Aprll 14, 1953 J. O'D. SHEPHERD 2,635,148

CROSSBAR TELEPHONE SYSTEM WITH MARKER RELEASE AND LOCKOUT OF DEFECTIVE LINE Original Filed May 5, 1943 53 Sheets-Sheet 5 lNVENTOR A T TORNEY P" 4, 1953 J. O'D. SHEPHERD 2,635,148

' CROSSBAR TELEPHONE SYSTEM WITH MARKER RELEASE AND LOCKOUT OF DEFECTIVE LINE Original Filed May 5, 1945 53 Sheets-Sheet 6 lNl ENTOR J OD SHEPHERD A T TORNEV April 1953 J. O'D. SHEPHERD 2,635,148

CROSSBAR TELEPHONE SYSTEM WITH MARKER RELEASE AND LOCKOUT OF DEFECTIVE LINE Original Filed May 5, 1943 55 Sheets-Sheet 8 v. D E R M R E 0 0H "m T P A N E w H .6 33mg? 1 N .D O 2553i 3.5: w .35 uziuzam Wm #3553 3:851

55 Sheets-Sheet 9 /N VENTOR .1 0D SHEPHERD B) A 7'7'0R/VEY his-wt *th Oh J. O'D. SHEPHERD CROSSBAR TELEPHONE SYSTEM WITH MARKER RELEASE AND LOCKOUT OF DEFECTIVE LINE April 14, 1953 Original Filed May 5, 1943 ATTORNEV 55 Sheets-Sheet l0 INVENTOR J 00. SHEPHERD O'D. SHEPHERD CROSSBAR TELEPHONE SYSTEM WITH MARKER RELEASE AND LOCKOUT OF DEFECTIVE LINE Original Filed May 5, 1943 ROM April 1-4, 1953 Aprll 14, 1953 J. on. SHEPHERD 2,635,148

CROSSBAR TELEPHONE SYSTEM WITH MARKER RELEASE AND LOCKOUT 0F DEFECTIVE LINE Original Filed May 5, 1943 55 Sheets-Sheet 11 5 6t B W M L a 0 w v Q HIQ v Q l x P I: w v EW I l S .5 u 4 l 1M fl I. 4 N H a Eu] -m h H I III III P L M 52 :5 6N QM- .INVEN r01? J 00. SHEPHERD BV ATTORNEY April 1953 J. O'D. SHEPHERD 2,635,148

CROSSBAR TELEPHONE SYSTEM WITH MARKER RELEASE AND LOCKOUT OF DEFECTIVE LINE Original Filed May 5, 1945 53 Sheets-Sheet 12 ,INI/ENTOR N B J 0D. SHEPHERD A TTORNEI H 8 u D N 4 R R 11 a E O 5 e RH T 3 mP r 6 w A 7 33:: ..D 3 0 WW KT. JV. m L B W H I M H E D mmF YO H mm mw mm 35km M @3553 R :uwmmokmzo A E "mm ww R E C R April 14, 1953 Original Filed May 5, 1943 Apnl 14, 1953 J. O'D. SHEPHERD 2,635,148

CROSSBAR TELEPHONE SYSTEM WITH MARKER v RELEASE AND LOCKOUT OF DEFECTIVE LINE Original Filed May 5, 1943 53 Sheets-Sheet 14 V E N TOR J 0'0. SHEPHERD B V ATTORNEY p 1953 J. OD. SHEPHERD 2,635,148

CROSSBAR TELEPHONE SYSTEM WITH MARKER RELEASE AND LOCKOUT OF DEFECTIVE LINE Original Filed May 5, 1943 53 Sheets-Sheet 15 TO INTERLl/VK T0 INTERLINK 2 J 022 SHEPHERD A 7' TOR/VEV Aprll 14, 1953 J. O'D. SHEPHERD 2,635,148

CROSSBAR TELEPHONE SYSTEM WITH MARKER .RELEASE AND LOCKOUT 0E DEFECTIVE LINE Original Filed May 5, 1943 53 Sheets-Sheet l ATTORNEY 53 Sheets-Sheet l7 lNl/ENTOR J. 0?). EPHERD ATTORNEY J. O'D. SHEPHERD CROSSBAR TELEPHONE SYSTEM WITH MARKER RELEASE AND LOCKOUT OF DEFECTIVE LINE Original Filed May 5, 1945 N tum April 14, 1953 APrl] 1953 J. O'D. SHEPHERD 2,635,148

CROSSBAR TELEPHONE SYSTEM WITH MARKER RELEASE AND LOCKOUT OF DEFECTIVE LINE Original Filed May 5, 1945 55 Sheets-Sheet 18 M/l/E/V TOR J 00 HEPHERD A T TORNEV April 14, 1953 J. O'D. SHEPHERD 2,635,148

CROSSBAR TELEPHONE SYSTEM WITH MARKER RELEASE AND LOCKOUT OF DEFECTIVE LINE orj ginal Filed May 5, 1945 53 Sheets-Sheet l9 //v VEN TOR D EPHERD FIG/9 A 7' TORNEY Aprll 14, 1953 J. OD. SHEPHERD 2,635,148

CROSSBAR TELEPHONE SYSTEM WITH MARKER RELEASE AND LOCKOUT OF DEFECTIVE LINE Original Filed May 5, 1943 55 Sheets-Sheet 2 T0 SHOMI ON sslvam LINK SENDER O GROUP 2 SHOMO SEA/DER I GROUP 2 Ha 1' EE SENDER LINK 2 SENDER O GROUP I LINK 0 SENDER I GROUP I IIHI- LEE-HM SNL I IN [/5 N TOR J O'DiHEPHERD 8V ATTORNEV 

